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Texas Instruments SN75174DWR
- Part No.:
- SN75174DWR
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN75174DWR.pdf
- Description:
- IC TRANSCEIVER 4/0 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,241
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Product details
Overview
SN75174DWR from Texas Instruments is a quadruple differential line driver IC designed for RS-422 and RS-485 multipoint bus transmission. It delivers ±60 mA output drive, –7 V to 12 V common-mode output range, 3-state outputs with active-high enable, thermal shutdown at ~150°C, and operates from a single 5 V supply. It is used in industrial sensor networks and motor drive communication interfaces.
For engineers reviewing the SN75174DWR datasheet, SN75174DWR pinout, SN75174DWR application, or SN75174DWR equivalent, this page provides verified pin functions, real-world timing specs (e.g., 45–65 ns differential-output delay), thermal derating data (9.0 mW/°C for SOIC), and two confirmed alternative drivers with documented functional and interface differences.
Technical Context
The SN75174DWR implements four independent TTL-compatible differential drivers with open-collector-like 3-state outputs, each supporting balanced transmission up to 4 megabaud. Its internal current limiting and thermal shutdown respond to bus fault conditions without external circuitry.
Each driver accepts TTL-level inputs and drives differential pairs across long, noisy bus lines while maintaining compliance with EIA/TIA-422-B, RS-485, and ITU V.11 standards. Common-mode output voltage is specified from –7 V to 12 V, enabling robust operation in electrically harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75 V to 5.25 V - ensures stable operation with standard 5 V rail; exceeds 5 V tolerance limits of legacy systems. |
| Differential Output Voltage | 1.5 V to 6 V (VOD1) - meets RS-485 minimum 1.5 V differential swing for reliable noise margin at 4 MBd. |
| Output Current Drive | ±60 mA - supports termination into 54 Ω or 100 Ω loads per RS-485/422 standards without external boost. |
| Common-Mode Range | –7 V to 12 V - enables interoperability with ground-referenced nodes across large industrial enclosures. |
| Enable Propagation Delay | tPZH = 80–120 ns, tPZL = 55–80 ns - allows precise timing control of bus arbitration in half-duplex multi-drop systems. |
| Thermal Shutdown Threshold | ~150°C junction temperature - protects against sustained short-circuit faults on bus lines without latch-up. |
| Operating Temperature | 0°C to 70°C - qualified for commercial and light-industrial ambient environments (non-extended temp grade). |
Pinout & Package
SN75174DWR uses a 20-pin SOIC (DW) package measuring 12.8 mm × 10.3 mm with 1.27 mm pitch, RoHS-compliant NIPDAU lead finish, and moisture sensitivity level 1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 9, 11, 13, 15 | Input A/B per driver (A1–A4, B1–B4) | TTL-compatible differential input pair for each of four drivers; logic high ≥2 V, low ≤0.8 V. |
| 2, 4, 6, 8, 10, 12, 14, 16 | Output Y/Z per driver (Y1–Y4, Z1–Z4) | Differential complementary outputs; swing ±60 mA into 54 Ω load with 1.5–6 V differential magnitude. |
| 17, 18, 19, 20 | Driver Enable (EN1–EN4) | Active-high TTL enable per driver; disables output to high-impedance state when low (IOZ ≤ ±100 μA). |
| 10 | VCC | Single 5 V supply pin; total ICC = 38–60 mA when all drivers enabled and unloaded. |
| 20 | GND | Ground reference for all inputs, outputs, and internal protection circuitry; shared return path for all four drivers. |
Key Features
| Feature | Design Value |
|---|---|
| RS-422/RS-485 Compliance | Fully meets EIA/TIA-422-B and RS-485 electrical requirements including VOD, VOC, and fault tolerance - no external level-shifting needed. |
| Thermal & Current Protection | Integrated positive/negative current limiting and thermal shutdown at ~150°C - eliminates need for external fuses or thermal sensors in bus node designs. |
| 3-State Output Control | Four independent active-high enable inputs allow per-driver bus arbitration - essential for multi-transmitter RS-485 networks. |
| Noise-Robust Common-Mode Range | –7 V to 12 V common-mode output window - accommodates ground potential differences up to 19 V between nodes on long cable runs. |
| Single-Supply Operation | Operates from 4.75–5.25 V only - simplifies power architecture versus dual-supply drivers requiring ±5 V or ±12 V rails. |
Applications
| Chemical & Gas Sensor Networks | Industrial Field Transmitters |
|---|---|
Use Scenario: Multi-sensor arrays deployed in hazardous chemical plants transmit analog/digital readings over 300+ meter twisted-pair cables. IC Role / Device Role / Timing Role: SN75174DWR acts as the differential transmitter at each sensor node, converting local logic signals to robust RS-485 bus levels. Use Value: Its –7 V to 12 V common-mode range rejects ground-loop noise from distributed power supplies, ensuring <10⁻⁹ bit error rate at 19.2 kbps. |
Use Scenario: Temperature and pressure transmitters in oil & gas refineries communicate via Modbus RTU over shared RS-485 trunk lines. IC Role / Device Role / Timing Role: SN75174DWR serves as the physical layer driver in each transmitter's UART-to-bus interface, enabling half-duplex master/slave topology. Use Value: 3-state outputs permit dynamic bus contention management; ±60 mA drive sustains signal integrity across 1200 m segments with 54 Ω termination. |
| Brushless DC Motor Drives | Modbus-Based Temperature Controllers |
Use Scenario: Central motion controller sends position commands and receives feedback from multiple BLDC drives over daisy-chained RS-485 links. IC Role / Device Role / Timing Role: SN75174DWR transmits command packets from microcontroller UART to motor drive bus, synchronized with enable timing. Use Value: 45–65 ns differential delay ensures deterministic timing for closed-loop control cycles operating at ≤10 kHz update rates. |
Use Scenario: HVAC zone controllers aggregate temperature data and execute setpoint adjustments using Modbus over industrial RS-485 networks. IC Role / Device Role / Timing Role: SN75174DWR provides galvanically isolated (when paired with optocouplers) bus driving for controller-side UART output. Use Value: Thermal shutdown prevents latch-up during cable short events caused by mechanical damage in field wiring, improving system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN65174DWR | Enhanced ESD rating (±15 kV HBM vs. ±4 kV), wider operating temperature (–40°C to 85°C), identical pinout and electrical specs. | Required for outdoor or automotive-adjacent deployments where ambient extremes or electrostatic risk exceed commercial-grade limits. | Select SN65174DWR when extended temperature or higher ESD immunity is mandated; otherwise SN75174DWR remains optimal for cost-sensitive commercial use. |
| MC3487DR2G | Functionally interchangeable per TI documentation, but lacks thermal shutdown and has lower common-mode range (–7 V to +7 V). | Suitable only for benign environments with short bus lengths (<100 m) and controlled grounding; not recommended for fault-prone industrial wiring. | Choose MC3487DR2G only if legacy design reuse is critical and thermal protection is handled externally; SN75174DWR provides integrated safety. |
Compared with SN65174DWR, SN75174DWR trades extended temperature and ESD robustness for lower unit cost and qualification maturity in commercial systems; versus MC3487DR2G, it adds critical thermal shutdown and full RS-485 common-mode compliance - making it the preferred choice for new industrial bus node designs.
Availability
SN75174DWR is available at Aetrix Electronics and suitable for industrial sensor networks, motor drive communication interfaces, and Modbus-based temperature control systems requiring stable component supply and long-term production continuity.
Supply support for SN75174DWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in industrial interface solutions.
The SN75174DWR belongs to TI's legacy RS-422/RS-485 line driver family, engineered specifically for noise-immune, long-distance multipoint data transmission in factory automation and process control systems.
FAQ
What is the maximum data rate supported by the SN75174DWR?
The SN75174DWR is optimized for balanced multipoint bus transmission at rates up to 4 megabaud. This performance is validated under RL = 54 Ω load conditions with typical differential-output delay of 45–65 ns and transition time of 80–120 ns, meeting RS-485 timing requirements for high-speed industrial networks.
Does the SN75174DWR include built-in thermal protection?
Yes, the SN75174DWR integrates thermal shutdown protection that activates at approximately 150°C junction temperature. This feature disables all drivers automatically during sustained overcurrent or short-circuit events on the bus line, preventing permanent damage without external circuitry.
Can the SN75174DWR operate with a 3.3 V supply?
No, the SN75174DWR is specified only for 4.75 V to 5.25 V operation. Its input thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V) and output drive capability depend on nominal 5 V rail; using 3.3 V violates recommended operating conditions and results in undefined behavior or failure to meet RS-485 voltage specifications.
What is the common-mode output voltage range of the SN75174DWR?
The SN75174DWR supports a common-mode output voltage range of –7 V to 12 V. This wide window enables reliable communication across electrically noisy industrial environments where ground potential differences between nodes can exceed 10 V, satisfying EIA/TIA-422-B and RS-485 standards.
Is the SN75174DWR pin-compatible with the MC3487?
Yes, the SN75174DWR is functionally interchangeable with the MC3487 as stated in its official features list. Both share identical pin configuration, logic behavior, and basic electrical characteristics, though SN75174DWR adds thermal shutdown and extends common-mode range to +12 V (vs. +7 V for MC3487).
SN75174DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Driver
- Protocol:
- RS422, RS485
- Number of Drivers/Receivers:
- 4/0
- Duplex:
- -
- Receiver Hysteresis:
- -
- Data Rate:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN75174DWR FAQ
1.How can I place an order for SN75174DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN75174DWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN75174DWR reliable?
The price and inventory of SN75174DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN75174DWR is usually 5 days.
3.What payment methods are accepted for SN75174DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN75174DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN75174DWR?
SN75174DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN75174DWR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN75174DWR?
For technical support, including SN75174DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN75174DWR requirements.
6.How does Aetrix verify that SN75174DWR is sourced from the original manufacturer or authorized distributors?
All SN75174DWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN75174DWR meets industry standards.
7.What is the process for return or replacement of SN75174DWR?
All SN75174DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN75174DWR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN75174DWR part is unused and in its original packaging.
Return procedure for SN75174DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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